VertX clamp. I liked the SenioRs too but the SMX was brand new and I hate starnuts so I put it on, it balanced out my scooter a bit more too.
And Vickayyyy, I'm not really the person to ask about deck weights because I like heavy scooters lol. It's about the same as the old TSIs I'd say, but it's distributed a lot better so it doesn't feel as heavy.